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研究了(艹卓)酮与对位取代苯乙烯类化合物的环加成反应.从光谱数据推测内型加成物的构型,说明环加成反应的周边选择性和区域选择性.用高效液相色谱测定了各个反应在140℃、155℃和162℃三个不同温度下的反应速度常数和活化参数,研究了取代基对反应性的影响.实验结果表明,(艹卓)酮与苯乙烯类化合物的Diels-Alder 反应属于主要由前线分子轨道控制的中性电子要求的Diels-Alder 反应.
The cycloaddition reaction of (acenaphthene) ketone with p-substituted styrenes was studied.The conformation of the internal adduct was deduced from the spectral data to show the peripheral selectivity and regioselectivity of the cycloaddition reaction.Using high efficiency The reaction rate constants and activation parameters of each reaction at 140 ℃, 155 ℃ and 162 ℃ were measured by liquid chromatography, and the effects of substituents on the reactivity were investigated. The experimental results show that the reaction of The Diels-Alder reaction of vinyl compounds belongs to the Diels-Alder reaction which is mainly required by the neutral electron controlled by the frontier molecular orbitals.